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A graphical predictive text input system

Dasher is an information-efficient text-entry interface, driven by natural
continuous pointing gestures. Dasher is a competitive text-entry system
wherever a full-size keyboard cannot be used - for example,

* on a palmtop computer
* on a wearable computer
* when operating a computer one-handed, by joystick, touchscreen, trackball,
or mouse
* when operating a computer with zero hands (i.e., by head-mouse or by
eyetracker).

The eyetracking version of Dasher allows an experienced user to write text
as fast as normal handwriting - 25 words per minute; using a mouse,
experienced users can write at 39 words per minute.

Dasher uses a more advanced prediction algorithm than the T9(tm) system
often used in mobile phones, making it sensitive to surrounding context.